Cool bass! Here's some details from the build record:
top: Burl Maple
body: Rock Maple
back: Burl Maple
body shape: Custom, 20th Anniversary with smooth bottom
neck: Maple and Purpleheart
scale: 34 long
fingerboard: Ebony
inlays: Pearloid (plastic) ovals
pickups: AXY4
controls: 20th Anniversary 2 vol, 2 filter, 2 Q-switch, pickup selector, stereo/mono output
originally made for: Guitar Workshop, Norway
birthday: not recorded, but likely late February or early March 1990
There was one previous registered owner from the UK in 2001.
There are no notes about the logo or the LEDs, so I think those are likely added later, and probably by Sims, since the bass has lived in England for at least 14 years.